Reversible fluorescent test strip with red fluorescent carbon dots for monitoring water in organic solvents: Visual detection via a smartphone.
Reversible fluorescent test strip with red fluorescent carbon dots for monitoring water in organic solvents: Visual detection via a smartphone.
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DOI：
10.1016/j.saa.2022.121195
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发表时间：
2022-03
期刊：
影响因子：
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通讯作者：
Xiaowei Mu;Xiaona Song;Dejiang Gao;Pinyi Ma;Qiong Wu;D. Song
中科院分区：
文献类型：
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作者：
Xiaowei Mu;Xiaona Song;Dejiang Gao;Pinyi Ma;Qiong Wu;D. Song
本文以中性红和酒石酸为原料，通过一步水热法制备了一种新型的红色碳量子点TN-CD。TN-CD的荧光随着水量的增加而逐渐淬灭，溶液的颜色从黄色变为粉红色（或紫色变为粉红色）。在N，N-二甲基甲酰胺（DMF）、甲醇（MeOH）、乙腈（ACN）和乙醇（EtOH）等有机溶剂中，反应在5s内完成，线性检测范围分别为1.2%~ 35.0%，0.5%~ 20.0%，0.25%~ 5.0%和0%~ 16.0%。此外，我们还制备了一种可重复使用的测试条，然后将其与TN-CD结合以检测DMF中的水含量，并将其与智能手机软件、紫外灯和暗室集成，以实时、现场、可视化定量检测水含量。
Herein, a novel type of red-emitting carbon dots called TN-CDs was created via a one-step hydrothermal approach using neutral red and tartaric acid as raw materials. The fluorescence of TN-CDs was gradually quenched as the amount of water increased, and the color of the solution changed from yellow to pink mauve (or purple to pink). The reaction could be completed within only 5 s in various organic solvents such as N,N-Dimethylformamide (DMF), methanol (MeOH), acetonitrile (ACN), and ethanol (EtOH) with linear detection ranges of 1.2%–35.0%, 0.5%–20.0%, 0.25%–5.0% and 0%–16.0%, respectively. In addition, we prepared a reusable test strip and then combined it with TN-CDs to detect water content in DMF, as well as integrated it with smartphone software, a UV lamp, and a dark chamber for real-time, on-site, visual quantitative detection of the water content.